I have seen people walk into a shop looking for a job with a portfolio full of images grabbed right off the internet. We caught them because they happened to use pictures of tattoos done by a friend of one of our artists. You should have seen the look on his face when we brought up the website he had pilfered from right there in the interview. It’s always good policy to have all the artists look over portfolios before hiring someone. Some times you catch them because of inconsistency in the portfolio. If it seems to contain 3 or 4 different styles some thing might be weird. There is no fool proof way of authenticating a portfolio.
Did she have other pieces like that one in her portfolio?
Anyway, butterflies are easily fixable. Hope you didn’t pay her.
You my need to let it heal before doing anything about it.